type Student = {
    name: string,
    age: number,
    isBoy: boolean
}
const zhangsan: Student = {
    name: "张三",
    age: 20,
    isBoy: false,
};

let lisi: Student = zhangsan;
lisi.name = "李四";
console.log(zhangsan.name);

const wangwu: Student = {
    name: "王五",
    age: 22,
    isBoy: true,
};

let clearlove: Student = { ...wangwu };
clearlove.name = "777";
console.log(wangwu.name);